Hydrotherapy spa



FIG. 1 is a top plan view of a hydrotherapy spa embodying my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front right perspective thereof; and

FIG. 7 is a bottom rear perspective thereof. 

The ornamental design for a hydrotherapy spa, substantially as shown and described. 